Lollipop is good. Flash the latest version lollipop of Kazhakasthan. F4om sammobile. Go to recovery. Wipe data and cache. Then boot into home screen. Den flash twrp from this site. Then flash supersu zip. Lollipop wl be faster than kitkat
http://forum.xda-developers.com/android/developm­ent/recovery-twrp-galaxy-a7-t3153369/post6177179­5
Thank the develooper who made this twrp. There is no other rooting method for galaxy a7. If you want viper4android to work in lollipop after rooting.. jus contact me.